HR: 0800h
AN: P31A-0957    [Abstracts]
TI: Energy transport in water rich ices
AU: * Smythe, W D
EM: wsmythe@lively.jpl.nasa.gov
AF: Jet Propulsion Laboratory m/s 183-601, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Goguen, J D
EM: Jay.D.Goguen@jpl.nasa.gov
AF: Jet Propulsion Laboratory m/s 183-601, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Kanik, I
EM: isik.kanik@jpl.nasa.gov
AF: Jet Propulsion Laboratory m/s 183-601, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Tsapin, A I
EM: Alexandre.Tsapin@jpl.nasa.gov
AF: Jet Propulsion Laboratory m/s 183-601, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Duxbury, N S
EM: Natalia.S.Duxbury@jpl.nasa.gov
AF: Jet Propulsion Laboratory m/s 183-601, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Fisher, P A
EM: Padma@scn.jpl.nasa.gov
AF: Jet Propulsion Laboratory m/s 183-601, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: orzechowska, G E
EM: Grazyna.E.Orzechowska@jpl.nasa.gov
AF: Jet Propulsion Laboratory m/s 183-601, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Leu, M
EM: ming-taun.leu@jpl.nasa.gov
AF: Jet Propulsion Laboratory m/s 183-601, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Johnson, P V
EM: Paul.V.Johnson@jpl.nasa.gov
AF: Jet Propulsion Laboratory m/s 183-601, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AB: Water ice is the dominant surface component on many surfaces in the solar system. Understanding interaction of ice with organic molecules is of prime importance to many current and planned flight missions [example current missions include Mars, where the polar caps may contain organics at some depth; Cassini, where Titan should have organics in abundance; and Deep Impact, where the organics may be mined with excavation of the icy crust]. Light and other radiation impinging on these surfaces serves both as a probe of the surface composition (as measured with remote sensing and in situ instruments) and as a source of energy that modifies, often greatly modifies, the ice-organic systems. One of the major unsolved problems is the ability to reliably calculate the detailed radiation field within icy surfaces that exhibit significant scattering, such as surface frosts or extensively fractured ice. This prevents accurate determination of the composition of ice mixtures quantitatively with remote sensing techniques, and prevents accurate estimation of reaction rates and products within a mixture. The need to be able to accurately model the radiance field within icy surfaces of solar system bodies requires achieving the the capability to determine quantitatively the composition of scattering ice mixtures with remote sensing measurement and the capability to predict accurately the evolution of ice mixtures under the conditions of space weathering. We report here progress on experiments designed to advance these capabilities.
DE: 5415 Erosion and weathering
DE: 5464 Remote sensing
SC: Planetary Sciences [P]
MN: 2004 AGU Fall Meeting